Antenna



FIG. 1 is a front, right perspective view of an antenna showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear, top, right perspective view thereof; and,

FIG. 9 is a rear, bottom, left perspective view thereof. 

CLAIM The ornamental design for an antenna, as shown and described. 